#include<stdio.h>


int func(int a)
{
		int b;
	switch(a)
	{
	case 1: b=30;
	case 2: b=20;
	case 3: b=10;
	default: b=0;
	}
	return b;
}
int main()
{
	func(1);
	printf("%d ",func(1));
	return 0;
}
